With CD we reached the nadair of what Joe Consumer wants from audio. All They care about is having no surface noise. Once it was gone they were sold. None of the
other tweaky audiophile stuff beyond that means jac ...
You sound like everyone who doesn't believe that SACD is a viable format is 'Joe Consumer', and only You, The Englightened One, know the Truth.
But the truth is that the advantages of SACD is terms of sound is from marginal to non-existant, and DSD process has some positive and some negative aspects. In fact, it is very hard to distinguish properly mastered Red Book format from high-res master from the SACD format.
Disadvantage of SACD - a lot. Not only, to quote you, 'Joe Consumer' does not care. Most of the serious collectors of either classical music or jazz do not care either. For instance, I have about 1000 CDs of classical recordings, about 500 CDs of jazz, and also some rock and pop. Neither majority of the classical CDs I own hasn't been re-released in SACD format, nor I care, simply because loots of recordings I have were made before 60s, not exactly state of the art recording equipment, and remastering the original master tape for SACD won't improve anything. I have no insentives to move to SACD.
Finally, some hard facts. 16-bit resolution which is Red Book format is suboptimal, this is true. However our hearing can't detect anything better than 18-bit resolution, so 20 and 24 bit resolution is simply an overkill, ditto for DSD, and furthermore, recording at high res (20 or 24 bits) and then dithering while convering to 16 bit is practically indistinguishable from 18-bit resolution, there was enough experiments done to confirm this point.
Incidently I don't care too much of DVD-A either. Multichannel and HT is a cheap gimmick. In fact, I've been reading that more and more people are moving away from HT to the regular 2-channel stereo setup. Good for them. I never bought HT concept in a first place.